Lunch bag



FIG. 1 is a perspective view of a lunch bag, showing our new design;

FIG. 2 is a front elevational view thereof shown with the broken lines removed for ease of illustration;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The even dash broken lines shown in the drawings represent environment and form no part of the claimed design. The dash-dot lines represent boundaries and form no part thereof. 

CLAIM The ornamental design for a lunch bag, as shown and described. 